Although I don’t use one myself, I can’t think of a better alternative than the Glock 19. Boy, those suckers are reliable even when slogged through mud and water.
I have four Glocks (17, 19, 21, 26). They are all basically the same. Known reliability is good, performance good, everything good. But still less than 50 years old and yet unproven with the test of time.
I’ve gotten into this fray before...and I’m not a Glock hater...but I don’t think its best for the Army. An Army pistol will in its service life be issued so a couple dozen different soldiers, who may or may not take care of it while in the field. If the wearer is a vehicle crewman, it will get banged and beat to hell every time they climb in and out of the hatch, and generally be abused. Just look at any photo of a current service pistol, and notice that all the bluing is gone, etc.
But besides that, it really does need to be idiot proof. A Drill SGT at the range has to be able to glance at a Private’s weapon, and see whether or not that huge red ‘off safe’ dot is visible. Too many trainees are holding a weapon in their hands for the first time.
Lastly, with all the gear, and climbing around, and low crawling...triggers can get pulled by accident.
Nothing against the Glock - just don’t think it suits the Army.